Reversible and irreversible dilation of lithium-ion battery electrodes investigated by in-situ dilatometry

Investigation of Li1.17Ni0.20Mn0.53Co0.10O2 as an Interesting Li‐ and Mn‐Rich Layered Oxide Cathode Material through Electrochemistry, Microscopy, and In Situ Electrochemical Dilatometry

“…HENCM cathodes were investigated already in situ by XRD and Raman spectroscopy, but there is no report yet on tracking the expansion/contraction (“breathing”) of these cathodes due to the deintercalation/intercalation of Li + ions upon cycling. We note that the usefulness of in situ dilatometry has been already demonstrated for graphite anodes and NCM cathodes, but not for HENCM cathodes.…”

Alternative binders for sustainable electrochemical energy storage – the transition to aqueous electrode processing and bio-derived polymers

“…Energy & Environmental Science (e.g., drying, calendaring) on the final electrode architecture and its mechanical properties. This evaluation ideally also includes the volumetric changes occurring on a micro-and macroscale upon cycling, e.g., by employing techniques like in situ dilatometry, [309][310][311] X-ray tomography, 312 or in situ hydrodynamic spectroscopy, 313 as such volume changes have a substantial impact on the eventual cycling performance and lifetime of the resulting electrodes.…”

A Dilatometric Study of Graphite Electrodes during Cycling with X-Ray Computed Tomography

“…3 During battery operation, graphite undergoes dilation and contraction; such changes are known to cause electrode strain and electrode particles can undergo swelling or cracking that contribute to the electrode's cumulative degradation. 4 Understanding how commonly adopted electrodes dilate can be of critical value in improving the durability of these storage devices.…”

“…Since the 1970s, electrochemical dilatometry (ECD) has been used to investigate the swelling or strain associated with host materials due to the intercalation and alloying of guest ions, atoms or molecules. 4,[9][10][11][12] The macroscopic dilation and contraction of graphite electrodes during charge/discharge in non-aqueous electrolytes can be recorded using in situ ECD and is therefore complementary to X-ray Diffraction (XRD) analysis, which provides information on the changes in a graphite crystal structure. 13 Phase transitions that occur in graphite during Li + intercalation, solid electrolyte interphase (SEI) formation and degradation mechanisms can be tracked using XRD, and the associated volume changes monitored with ECD.…”

“…Numerous articles report the volume changes in graphite electrodes, during cycling, using in situ ECD, with dimensional changes ranging between 4%-10% owing to differences in electrolyte and cell configuration. [4][5][6][7][8][9][10][11][12][13][14][15] However, to the author's knowledge, there is to-date no research corroborating in situ ECD with visual inspection using X-ray computed tomography (X-ray CT) and image-based modelling.…”